we have a 1995 pace arrow motorhome. the radio is not working ,the cb is not working, the ignition is not working . we have checked all the fuses and they are good. checked the battery cables .they are all ok. could some one please suggest what the problem could be. my husband thinks that it might be in the big fuse box which is located on the driver side on the outside under the hood. any suggestions would be greatly appreciated thanks